Brake drum inner cavity shakeout tool and brake drum shakeout method

Abstract

According to the brake drum inner cavity shakeout tool and the brake drum shakeout method, the brake drum inner cavity shakeout tool is installed on a shakeout machine and used for supporting and limiting a brake drum, and therefore old sand in the brake drum is shaken off under driving of the shakeout machine. The shakeout tool comprises a primary tool and a secondary tool, the primary tool comprises a supporting part and a connecting part which are connected, and the periphery of the supporting part outwards exceeds the connecting part and forms a supporting surface so as to be supported at the bottom of the brake drum. The supporting part is used for being connected with the shakeout machine. The top of the connecting part is open, and the connecting part is hollow and forms a cavity. The son tool is connected to the mother tool and used for abutting against an inner cavity of the brake drum and limiting the brake drum to prevent the brake drum from shaking relative to the shakeout tool. The secondary tool is provided with a sand shakeout hole, the sand shakeout hole corresponds to the cavity, and after the secondary tool is connected to the primary tool, the sand shakeout hole can communicate with the cavity, so that the used sand falls into the cavity, and the used sand in the inner cavity of the brake drum is cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of automobile brake drum casting, in particular to a brake drum inner cavity sand dropping tool and a brake drum sand dropping method. Background Art

[0002] Automobile brake drum is an indispensable part in the automobile manufacturing process, and also a safety part of the automobile, which has an important impact on driving safety. Brake drum is a vulnerable part, which is easily affected by human and method factors during the casting process, resulting in uneven surface, which in turn affects the braking effect.

[0003] However, the traditional method of cleaning the old sand left in the inner cavity of the brake drum requires manual cleaning, which leads to problems such as high labor intensity, poor environment, large impact of human factors, and easy damage to castings or operators. In addition, there are many types of brake drum products with different sizes. When using the sand removal tooling, it is inconvenient to replace the tooling, affecting the production rhythm and efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a brake drum inner cavity sand removal tool, which can automatically clean old sand and facilitate the replacement of the tool.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present invention, there is provided a brake drum inner cavity sand-dropping fixture, which is installed on a sand-dropping machine and is used to support and limit the brake drum, and the brake drum inner cavity sand-dropping fixture comprises: a mother fixture, which comprises a support portion and a connecting portion fixedly arranged on the support portion, the outer periphery of the support portion extends outwardly beyond the connecting portion, and the portion of the support portion extending outwardly beyond the connecting portion constitutes a support surface for supporting the brake drum; the support portion is used to be connected to the sand-dropping machine, the top of the connecting portion is open and the inside is hollow to form a chamber; a sub-fitting is arranged on the mother fixture, and is used to abut against the inner cavity of the brake drum to limit the brake drum; the sub-fitting is provided with a sand-dropping hole which passes through from top to bottom; the sand-dropping hole is arranged corresponding to the chamber, so that after the sub-fitting is connected to the mother fixture, the sand-dropping hole can be connected to the chamber; wherein, the sub-fitting is overlapped on the top of the connecting portion and is detachably connected or the lower part of the sub-fitting is sleeved on the outer periphery of the connecting portion and is detachably connected to the peripheral side wall of the connecting portion.

[0007] In one embodiment of the present application, the supporting portion is provided with one or more sand removal notches, and the sand removal notches are connected to the chamber; the connecting portion is provided with a plurality of connecting walls, and the plurality of connecting walls enclose the chamber; the sub-tooling includes a mounting portion and a limiting portion arranged on the mounting portion, and the mounting portion is provided with a mounting wall; the connecting wall is arranged corresponding to the mounting wall, so that the connecting wall and the mounting wall can be detachably connected through a connecting piece.

[0008] In one embodiment of the present application, a plurality of the connecting walls are connected end to end to form a closed structure; or, a plurality of the connecting walls are connected to form a connecting portion having at least one side opening, and the side opening is arranged corresponding to the sand discharge notch, and a side notch corresponding to the side opening is provided on the sub-tooling, and the sand discharge notch, the side opening and the side notch together form a sand discharge channel.

[0009] In one embodiment of the present application, the mounting wall is located at the outer periphery of the connecting wall, and an overlapping step is further provided on the inner side of the mounting portion for abutting against the top and side of the connecting wall.

[0010] In one embodiment of the present application, connecting through holes are provided on the connecting wall and the mounting wall; the connecting member is configured as a connecting bolt; the connecting through hole is used to pass the connecting bolt, so that the connecting wall and the mounting wall are detachably connected via the connecting bolt.

[0011] In one embodiment of the present application, a butt flange is provided on the sub-tool; the butt flange butts against the inner cavity wall of the brake drum to limit the movement of the brake drum along its own radial direction.

[0012] In one embodiment of the present application, the sub-tool is also provided with a limiting flange; the limiting flange is spaced above the abutting flange; the limiting flange is coaxially arranged with the abutting flange, and the diameter of the limiting flange is smaller than the diameter of the abutting flange; the limiting flange abuts against the inner cavity wall of the brake drum to limit the movement of the brake drum along its own radial direction.

[0013] In one embodiment of the present application, a plurality of through holes are formed on the abutting flange; the plurality of through holes are symmetrically arranged around the axis of the abutting flange so that the fallen sand can fall along the through holes.

[0014] In one embodiment of the present application, a chamfer is provided on a side of the support portion facing away from the outlet of the shakeout machine, so that the shakeout sand flows along the chamfer.

[0015] In one embodiment of the present application, the brake drum inner cavity sand removal tooling includes a mother tooling and multiple sub-toolings; the sub-toolings are detachably connected to the mother tooling, and when multiple sub-toolings are installed on the mother tooling, the heights between the tops of the sub-toolings and the supporting surface are different.

[0016] The present application also provides a brake drum sand removal method, which is applicable to any of the brake drum inner cavity sand removal tools; the brake drum sand removal method comprises:

[0017] Connecting the mother tooling to the shakeout machine;

[0018] According to the model of the brake drum, a corresponding sub-tool is selected and detachably connected to the main tool;

[0019] The brake drum to be desanded is placed on the desanding tooling, and the desanding machine is turned on to clean the old sand in the brake drum by vibration.

[0020] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:

[0021] In the present invention, the sand-dropping tool for the inner cavity of the brake drum is installed on the sand-dropping machine and is used to support and limit the brake drum, so that the old sand in the brake drum is shaken off under the drive of the sand-dropping machine. The sand-dropping tool includes a mother tool and a child tool. Specifically, the mother tool includes a supporting part and a connecting part connected to each other, and the outer periphery of the supporting part outwardly exceeds the connecting part. The part of the supporting part outwardly exceeding the connecting part constitutes a supporting surface to support the bottom of the brake drum. The supporting part is used to connect with the sand-dropping machine, and the top of the connecting part is open and the inside is hollow to form a chamber. The child tool is connected to the mother tool to be used to abut against the inner cavity of the brake drum, so as to limit the brake drum and prevent the brake drum from shaking relative to the sand-dropping tool. The child tool is provided with a sand-dropping hole that passes through from top to bottom, and the sand-dropping hole is arranged corresponding to the chamber, so that after the child tool is connected to the mother tool, the sand-dropping hole can be connected to the chamber, so that the shaken old sand falls into the chamber, thereby realizing the cleaning of the old sand in the inner cavity of the brake drum.

[0022] At the same time, the sub-fitting is overlapped on the top of the connecting part and is detachably connected, or the lower part of the sub-fitting is sleeved on the outer periphery of the connecting part and is detachably connected to the connecting part, thereby facilitating the replacement of the sub-fitting and enabling the sand-falling fixture to adapt to different models of brake drums. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a brake drum inner cavity sand removal tool and a brake drum according to an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 Schematic diagram of the brake drum inner cavity sand removal tool and the cross-sectional view of the brake drum.

[0025] Figure 3 yes Figure 1 Schematic diagram of the brake drum inner cavity sand removal tooling.

[0026] Figure 4 yes Figure 1 Schematic diagram of the exploded view of the brake drum inner cavity sand removal tooling.

[0027] Figure 5 yes Figure 1 Schematic diagram of the sub-tooling of the brake drum inner cavity sand falling tooling.

[0028] Figure 6 yes Figure 1 A schematic diagram of another embodiment of a brake drum inner cavity sand removal tool.

[0029] Figure 7 yes Figure 1 A schematic diagram of another embodiment of a brake drum inner cavity sand removal tool.

[0030] Figure 8 yes Figure 1 A schematic diagram of another embodiment of a brake drum inner cavity sand removal tool.

[0031] Fig. 9 4 is a flow chart of a brake drum sand removal method according to an embodiment of the present invention.

[0032] The following are the descriptions of the reference numerals:

[0033] 1-brake drum; 10-mother tooling; 11-supporting part; 12-connecting part; 13-chamber; 14-chamfer; 20-sub-tooling; 21-sand removal hole; 22-installing part; 23-limiting part; 30-connecting through hole; 31-connecting bolt; 111-supporting surface; 112-sand discharge notch; 113-side opening; 121-connecting wall; 221-installing wall; 222-side notch; 223-overlap step; 231-top flange; 232-limiting flange; 233-through hole; 234-connecting cylinder. DETAILED DESCRIPTION

[0034] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0035] In the description of the present invention, it is to be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] The traditional method of cleaning the old sand left in the inner cavity of the brake drum requires manual cleaning, which leads to problems such as high labor intensity, poor environment, large impact of human factors, and easy injury to castings or operators. In addition, there are many types of brake drum products with different sizes. When using a sand removal tool, it will be inconvenient to replace the tool, affecting the production cycle and efficiency. Therefore, a sand removal tool for the inner cavity of the brake drum is proposed to solve the above problems.

[0038] The scheme is further illustrated by the following examples:

[0039] Figure 1 It is a schematic diagram of a brake drum inner cavity sand removal tool and a brake drum according to an embodiment of the present invention. Figure 2 yes Figure 1 Schematic diagram of the brake drum inner cavity sand removal tool and the cross-sectional view of the brake drum.

[0040] See also Figure 1 and Figure 2 The brake drum inner cavity sand-falling tool of this embodiment is installed on the sand-falling machine and is used to support and limit the brake drum 1. Specifically, the sand-falling tool is installed on the output end of the sand-falling machine, that is, the sand-falling tool is connected to the vibration plate of the sand-falling machine, so that the sand-falling machine can drive the sand-falling tool and the brake drum 1 to shake, thereby shaking off the old sand in the inner cavity of the brake drum 1, thereby cleaning the old sand in the inner cavity of the brake drum 1.

[0041] In this embodiment, the brake drum inner cavity sand knocking tool may include a main tool 10 and a sub tool 20 .

[0042] The female tooling 10 may include a support portion 11 and a connection portion 12, and the connection portion 12 may be fixedly arranged on the support portion 11. Specifically, the outer periphery of the support portion 11 outwardly exceeds the connection portion 12, and the portion of the support portion 11 outwardly exceeding the connection portion 12 constitutes a support surface 111. The support surface 111 may be used to support the bottom edge of the brake drum 1. At the same time, the support portion 11 is used to connect with the sand-falling machine, that is, the bottom of the support portion 11 is connected to the sand-falling machine. The top of the connection portion 12 is open and the interior is hollow, so that a chamber 13 is formed inside the female tooling 10.

[0043] The sub-tool 20 is arranged on the mother tool 10, and the sub-tool 20 is used to abut against the inner cavity of the brake drum 1, so that the sub-tool 20 limits the brake drum 1. At the same time, the sub-tool 20 is provided with a sand-dropping hole 21 that passes through from top to bottom, and the sand-dropping hole 21 is arranged corresponding to the chamber 13, so that after the sub-tool 20 is connected to the mother tool 10, the sand-dropping hole 21 can be connected to the chamber 13, so that during the vibration process of the sand-dropping machine, the old sand in the inner cavity of the brake drum 1 can fall into the chamber 13 along the sand-dropping hole 21, thereby separating the old sand from the brake drum 1, and completing the sand cleaning work of the brake drum 1.

[0044] It should be noted that the sub-tool 20 can be overlapped on the top of the connecting portion 12 and can be detachably connected, so as to facilitate the assembly or disassembly between the sub-tool 20 and the mother tool 10. Of course, the lower part of the sub-tool 20 can be sleeved on the outer periphery of the connecting portion 12 and can be detachably connected to the peripheral side wall of the connecting portion 12, so as to facilitate the assembly or disassembly between the sub-tool 20 and the mother tool 10, and then facilitate the replacement of the sub-tool 20, so that the sand-falling tool can select the sub-tool 20 according to different models of brake drums 1, so that the sand-falling tool can adapt to different models of brake drums 1, expanding the use range of the sand-falling tool. At the same time, the detachable connection between the sub-tool 20 and the mother tool 10 can facilitate the operator to replace the sub-tool 20, thereby reducing the operator's work intensity.

[0045] Figure 3 yes Figure 1 Schematic diagram of the brake drum inner cavity sand removal tooling. Figure 4 yes Figure 1 Schematic diagram of the exploded view of the brake drum inner cavity sand removal tooling.

[0046] See also Figure 3 and Figure 4 The support portion 11 may be provided with a sand discharge notch 112, which is connected to the chamber 13, so that the old sand in the chamber 13 can be discharged through the sand discharge notch 112, thereby preventing the old sand from accumulating in the chamber 13. Specifically, the sand discharge notch 112 faces the outlet of the sand shakeout machine, so as to facilitate the smooth discharge of the old sand in the chamber 13, thereby preventing the old sand from accumulating too much in the chamber 13 and affecting the cleaning of the old sand in the inner cavity of the brake drum 1.

[0047] In addition, a chamfer 14 is provided on the side of the support portion 11 away from the outlet of the sand shaker, so that the falling sand flows along the chamfer 14, avoiding the accumulation of old sand or falling sand on the side of the support portion 11 away from the outlet of the sand shaker. It should be noted that when cleaning the old sand in the inner cavity of the brake drum 1, the casting structure and the exhaust structure generated during the casting process will also be cleaned, and both will fall onto the sand shaker. Therefore, the chamfer 14 is provided on the support portion 11, which can facilitate the falling sand or old sand and the casting structure and the exhaust structure to flow smoothly to the outlet of the sand shaker, avoiding the accumulation of falling sand or old sand and the casting structure and the exhaust structure on the sand shaker, reducing the manual cleaning process, and allowing the sand shaker process to continue.

[0048] It should be noted that, in some other embodiments, the support portion 11 may be provided with a plurality of sand discharge notches 112 , and the plurality of sand discharge notches 112 are arranged on the peripheral side of the support portion 11 , so that the old sand in the chamber 13 can be discharged smoothly through the sand discharge notches 112 .

[0049] In addition, it should be noted that, compared with the solution in which a plurality of sand discharge notches 112 are provided on the support part 11, the solution in which only one sand discharge notch 112 is provided on the support part 11 is more conducive to the circulation and discharge of the casting structure and the exhaust structure. Because in this solution, the sand discharge notch 112 faces the outlet of the sand drop machine, and the support part 11 is provided with a chamfer 14 on the side opposite to the sand discharge notch 112, which is conducive to the circulation and discharge of the casting structure and the exhaust structure, and also avoids the influence of the structures of the mother fixture 10 and the child fixture 20 on the circulation and discharge of the casting structure and the exhaust structure.

[0050] See also Figure 3 and Figure 4 , the connection part 12 may be provided with a plurality of connection walls 121, and the plurality of connection walls 121 encloses to form a chamber 13. Specifically, the plurality of connection walls 121 may be connected end to end to form a closed structure, that is, the plurality of connection walls 121 enclose a cylindrical structure with a closed side wall, so that the connection part 12 forms a structure similar to a cylindrical structure. Alternatively, the plurality of connection walls 121 are connected to form a connection part 12 having at least one side opening 113, and the side opening 113 is arranged corresponding to the sand discharge notch 112, so that the side opening 113 and the sand discharge notch 112 are connected, so that the old sand in the chamber 13 can be discharged from the side opening 113 and the sand discharge notch 112.

[0051] It should be noted that when multiple connecting walls 121 are connected end to end to form a closed structure, a sand discharge gap 112 can be opened at the bottom of the connecting part 12, that is, a sand discharge gap 112 is opened on the supporting part 11, so that the sand discharge gap 112 is connected to the chamber 13, so that the old sand in the chamber 13 can be discharged from the sand discharge gap 112.

[0052] In some other embodiments, the plurality of connecting walls 121 may be arranged at intervals, so that a side opening 113 is formed between two adjacent connecting walls 121 , so that the fallen sand in the chamber 13 can be discharged from the side opening 113 .

[0053] In addition, the support portion 11 and the connecting portion 12 may also be provided in an integrated manner, that is, the connecting wall 121 may be provided in an integrated manner with the support portion 11. In some other embodiments, the connecting wall 121 may be welded to the support portion 11.

[0054] See also Figure 3 and Figure 4 The sub-tool 20 may include a mounting portion 22 and a limiting portion 23. The limiting portion 23 is arranged on the mounting portion 22.

[0055] In this embodiment, the mounting portion 22 may be provided with a mounting wall 221 , and the connecting wall 121 is provided corresponding to the mounting wall 221 , so that the connecting wall 121 and the mounting wall 221 can be detachably connected via a connecting piece.

[0056] In some other embodiments, the connecting portion 12 and the mounting portion 22 may both be configured as connecting flanges, so that the connecting portion 12 and the mounting portion 22 can be connected via connecting bolts, thereby connecting the sub-tooling 20 to the mother tooling 10.

[0057] It should be noted that the sub-tooling 20 may be provided with a side notch 222 corresponding to the side opening 113, so that the sand discharge notch 112, the side opening 113 and the side notch 222 together form a sand discharge channel, so that the old sand in the chamber 13 can be discharged from the chamber 13 along the sand discharge channel.

[0058] Specifically, the side notch 222 may be provided on the mounting portion 22 , that is, the mounting portion 22 may be provided with a plurality of mounting walls 221 , and the plurality of mounting walls 221 enclose the mounting portion 22 with a notch on one side.

[0059] Figure 5 yes Figure 1 Schematic diagram of the sub-tooling of the brake drum inner cavity sand removal tooling.

[0060] See also Figure 3 , Figure 4 and Figure 5 The mounting wall 221 can be located at the outer periphery of the connecting wall 121, and a lap step 223 is also provided on the inner side of the mounting portion 22, so that the lap step 223 can be used to support the top and side of the connecting wall 121, thereby making the weight of the sub-tooling 20 fall on the top of the connecting wall 121, and the side of the connecting wall 121 can limit the mounting wall 221.

[0061] In addition, it should be noted that in actual use, the height of the mounting wall 221 is smaller than the connecting wall 121, so that after the mounting portion 22 is connected to the connecting portion 12, that is, after the top of the connecting wall 121 abuts against the overlapping step 223, a certain gap is formed between the bottom of the mounting wall 221 and the top surface of the supporting portion 11, that is, a certain gap is formed between the bottom of the mounting wall 221 and the supporting surface 111, for example, a gap of 0.8-1.5 mm is formed between the bottom of the mounting wall 221 and the supporting surface 111, thereby preventing the old sand on the supporting portion 11 from affecting the installation of the sub-tooling 20.

[0062] At the same time, a gap is formed between the installation wall 221 and the connecting wall 121 to facilitate the connection of the installation part 22 to the connecting part 12. For example, the gap between the installation wall 221 and the connecting wall 121 can be set to 1-3mm, so that the installation part 22 can be conveniently sleeved on the connecting part 12.

[0063] like Figure 3 As shown, connecting through holes 30 may be provided on the connecting wall 121 and the mounting wall 221, and the connecting parts may be configured as connecting bolts 31, and the connecting through holes 30 may be used to pass the connecting bolts 31, so that the connecting wall 121 and the mounting wall 221 may be detachably connected via the connecting bolts 31, thereby facilitating the operator to install the sub-tooling 20 on the mother tooling 10, or facilitating the operator to replace the sub-tooling 20 on the mother tooling 10.

[0064] It should be noted that after the sub-tooling 20 is installed on the main tooling 10, the top of the connecting wall 121 abuts against the overlapping step 223. Therefore, in this embodiment, the connecting bolt 31 only plays a connecting role in the horizontal direction, and does not serve as a vertical load-bearing role, thereby improving the service life of the connecting bolt 31.

[0065] At the same time, during actual use, the axis of the connecting bolt 31 extends in the horizontal direction, and the nut of the connecting bolt 31 is located outside the chamber 13, that is, the nut of the connecting bolt 31 is located on the side of the mounting wall 221 away from the connecting wall 121, and the nut that cooperates with the connecting bolt 31 is located in the chamber 13 to facilitate the installation or disassembly of the connecting bolt 31.

[0066] Figure 6 yes Figure 1 A schematic diagram of another embodiment of a brake drum inner cavity sand removal tool. Figure 7 yes Figure 1 A schematic diagram of another embodiment of a brake drum inner cavity sand removal tool. Figure 8 yes Figure 1 A schematic diagram of another embodiment of a brake drum inner cavity sand removal tool.

[0067] See also Figure 2 , Figure 3 and Figure 4 The sub-tool 20 may be provided with a butting flange 231. The butting flange 231 may butt against the inner cavity wall of the brake drum 1, thereby limiting the movement of the brake drum 1 along its own radial direction and preventing the brake drum 1 from shaking relative to the sand falling tool.

[0068] It should be noted that if Figure 7 and Figure 8 As shown, when the abutting flange 231 is the top of the sub-tooling 20, there is a gap between the top of the abutting flange 231 and the connecting part of the brake drum 1, that is, there is a gap between the top of the abutting flange 231 and the top of the inner cavity of the brake drum 1 to avoid the abutting flange 231 scratching the connecting part of the brake drum 1.

[0069] Specifically, the total height of the sand-falling tooling is less than the depth of the inner cavity of the brake drum 1, so that after the bottom of the brake drum 1 abuts against the support surface 111, there is a certain distance between the top of the sand-falling tooling and the top of the inner cavity of the brake drum 1, thereby preventing the top of the sub-tooling 20 from contacting the top of the inner cavity of the brake drum 1 and preventing the top of the sub-tooling 20 from scratching the brake drum 1.

[0070] See also Figure 2 , Figure 3 and Figure 6 The sub-tool 20 may also be provided with a limiting flange 232. The limiting flange 232 is spaced above the abutting flange 231. Specifically, the abutting flange 231 and the limiting flange 232 are connected by a connecting cylinder 234, so that the abutting flange 231 and the limiting flange 232 are spaced apart.

[0071] In this embodiment, the limiting flange 232 is coaxially arranged with the abutting flange 231, and the diameter of the limiting flange 232 is smaller than the diameter of the abutting flange 231, so that the limiting flange 232 abuts against the inner cavity wall of the brake drum 1 to limit the movement of the brake drum 1 along its own radial direction.

[0072] like Figure 2 and Figure 6 As shown, when the limiting flange 232 is the top of the sub-tooling 20, there is a gap between the top of the limiting flange 232 and the connecting part of the brake drum 1, that is, there is a gap between the top of the limiting flange 232 and the top of the inner cavity of the brake drum 1 to prevent the limiting flange 232 from scratching the connecting part of the brake drum 1.

[0073] In this embodiment, a plurality of through holes 233 may be formed on the abutting flange 231 , wherein the plurality of through holes 233 are symmetrically arranged around the axis of the abutting flange 231 , so that the falling sand can fall along the through holes 233 .

[0074] See also Figure 5-8The sand-falling tooling may include a mother tooling 10 and a plurality of sub-toolings 20. The sub-toolings 20 are detachably connected to the mother tooling 10, and when the plurality of sub-toolings 20 are installed on the mother tooling 10, the heights between the tops of the sub-toolings 20 and the supporting surface 111 are different, so that the sand-falling tooling can adapt to different types of brake drums 1, and then can adapt to different brake drums 1 by replacing different sub-toolings 20, thereby improving the sand-clearing efficiency of the brake drum 1.

[0075] Specifically, Figure 5 and Figure 6 As shown, Figure 5 In the sub-tool 20, the top flange 231 is spaced apart from the top of the mounting portion 22, and Figure 6 In the sub-tool 20, the top flange 231 can be directly connected to the top of the mounting portion 22, and the spacing between the top flange 231 and the limiting flange 232 in the two sub-tools 20 is the same, so that after the two sub-tools 20 are connected to the mother tool 10, the height between the top of the sub-tool 20 and the support surface 111 is different. Figure 7 and Figure 8 As shown, in the two sub-tools 20 , the distances between the abutting flange 231 and the top of the mounting portion 22 are different, so that after the two sub-tools 20 are connected to the mother tool 10 , the heights between the tops of the sub-tools 20 and the supporting surface 111 are different.

[0076] In summary, the sand-falling fixture is installed on the sand-falling machine, and is used to support and limit the brake drum 1, so that the old sand in the brake drum 1 can be shaken off under the drive of the sand-falling machine. Among them, the sand-falling fixture includes a mother fixture 10 and a child fixture 20, and the mother fixture 10 includes a supporting portion 11 and a connecting portion 12 connected to each other, and the outer periphery of the supporting portion 11 extends outwardly beyond the connecting portion 12. The part of the supporting portion 11 that extends outwardly beyond the connecting portion 12 constitutes a supporting surface 111 to support the bottom of the brake drum 1. The supporting portion 11 is used to connect with the sand-falling machine, and the top of the connecting portion 12 is open and hollow inside to form a chamber 13. The child fixture 20 is connected to the mother fixture 10 to abut against the inner cavity of the brake drum 1, so as to limit the brake drum 1 and prevent the brake drum 1 from shaking relative to the sand-falling fixture. The sub-tooling 20 is provided with a sand-falling hole 21 which passes through from top to bottom, and the sand-falling hole 21 is arranged corresponding to the chamber 13. Therefore, after the sub-tooling 20 is connected to the mother tooling 10, the sand-falling hole 21 can be connected with the chamber 13, so that the old sand falls into the chamber 13, thereby cleaning the old sand in the inner cavity of the brake drum 1.

[0077] At the same time, the sub-tooling 20 is overlapped on the top of the connecting part 12 and is detachably connected, or the lower part of the sub-tooling 20 is sleeved on the outer periphery of the connecting part 12 and is detachably connected to the connecting part 12, thereby facilitating the replacement of the sub-tooling 20, thereby facilitating the replacement of the sand-falling tooling, and being able to adapt to different models of brake drums 1.

[0078] Fig. 9 4 is a flow chart of a brake drum sand removal method according to an embodiment of the present invention.

[0079] See also Fig. 9 The present application also provides a brake drum sand removal method, which is applicable to the aforementioned brake drum inner cavity sand removal tooling. Specifically, the brake drum sand removal method includes the following steps:

[0080] S1. Removably connect the female tooling 10 to the sand-dropping machine. Specifically, the female tooling 10 can be welded to the vibration plate of the sand-dropping machine, or connected to the vibration plate of the sand-dropping machine by bolts.

[0081] S2. Select the corresponding sub-tool 20 according to the model of the brake drum 1 and connect it to the mother tool 10. Specifically, select the corresponding sub-tool 20 according to the model of the brake drum 1, and connect the sub-tool 20 to the mother tool 10 through a connector, so that the sub-tool 20 can limit the inner cavity of the brake drum 1 placed on the falling sand tool.

[0082] S3, placing the brake drum 1 to be sanded out on the sand-stripping tooling, and turning on the sand-stripping machine to clean the old sand in the brake drum 1 by vibration. That is, driven by the vibration of the sand-stripping machine, the old sand in the inner cavity of the brake drum 1 is shaken out, and the old sand is made to fall from the sand-stripping hole 21 of the sub-tooling 20 and the chamber 13 of the main tooling 10, thereby cleaning the old sand in the inner cavity of the brake drum 1.

[0083] Since the sub-tool 20 can be selected or replaced according to the model of the brake drum 1, the sand-falling tool and the sand-falling method can adapt to different models of brake drums 1. In addition, the sub-tool 20 is detachably connected to the mother tool 10, which can facilitate the replacement of the sub-tool 20, thereby reducing the workload of the operator.

[0084] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A brake drum inner cavity sand-falling tool, installed on a sand-falling machine and used to support and limit the brake drum, characterized in that: The brake drum inner cavity sand removal tooling comprises: A female tooling, comprising a support portion and a connecting portion fixedly arranged on the support portion, wherein the outer periphery of the support portion extends outwardly beyond the connecting portion, and the portion of the support portion extending outwardly beyond the connecting portion constitutes a supporting surface for supporting a brake drum; the support portion is used to be connected to a sand shakeout machine, and the top of the connecting portion is open and the interior is hollow to form a chamber; A sub-tooling is arranged on the mother tooling and is used to abut against the inner cavity of the brake drum to limit the position of the brake drum; the sub-tooling is provided with a sand falling hole which passes through from top to bottom; the sand falling hole is arranged corresponding to the chamber, so that after the sub-tooling is connected to the mother tooling, the sand falling hole can communicate with the chamber; The sub-tool is overlapped on the top of the connecting part and is detachably connected, or the lower part of the sub-tool is sleeved on the outer periphery of the connecting part and is detachably connected to the peripheral side wall of the connecting part.

2. The brake drum inner cavity sand removal tool according to claim 1, characterized in that: The supporting portion is provided with one or more sand discharge notches, and the sand discharge notches are connected to the chamber; the connecting portion is provided with a plurality of connecting walls, and the plurality of connecting walls enclose the chamber; the sub-tooling includes a mounting portion and a limiting portion arranged on the mounting portion, and the mounting portion is provided with a mounting wall; the connecting wall is arranged corresponding to the mounting wall, so that the connecting wall and the mounting wall can be detachably connected through a connecting piece.

3. The brake drum inner cavity sand removal tool according to claim 2, characterized in that: A plurality of the connecting walls are connected end to end to form a closed structure; or, a plurality of the connecting walls are connected to form a connecting portion having at least one side opening, and the side opening is arranged corresponding to the sand discharge notch, and a side notch corresponding to the side opening is provided on the sub-tooling, and the sand discharge notch, the side opening and the side notch together form a sand discharge channel.

4. The brake drum inner cavity sand removal tool according to claim 2, characterized in that: The installation wall is located at the outer periphery of the connecting wall, and an overlapping step is further arranged on the inner side of the installation portion for abutting against the top and side of the connecting wall.

5. The brake drum inner cavity sand removal tool according to claim 2, characterized in that: The connecting wall and the mounting wall are both provided with connecting through holes; the connecting member is provided with a connecting bolt; the connecting through hole is used for passing the connecting bolt, so that the connecting wall and the mounting wall are detachably connected via the connecting bolt.

6. The brake drum inner cavity sand removal tool according to claim 1, characterized in that: The sub-tool is provided with a butting flange; the butting flange butts against the inner cavity wall of the brake drum to limit the movement of the brake drum along its own radial direction.

7. The brake drum inner cavity sand removal tool according to claim 6, characterized in that: The sub-tool is also provided with a limiting flange; the limiting flange is spaced above the abutting flange; the limiting flange is coaxially arranged with the abutting flange, and the diameter of the limiting flange is smaller than the diameter of the abutting flange; the limiting flange abuts against the inner cavity wall of the brake drum to limit the movement of the brake drum along its own radial direction.

8. The brake drum inner cavity sand removal tool according to claim 6, characterized in that: The abutting flange is provided with a plurality of through holes; the plurality of through holes are symmetrically arranged around the axis of the abutting flange so that the falling sand can fall along the through holes.

9. The brake drum inner cavity sand removal tool according to claim 1, characterized in that: A chamfer is provided on the side of the support portion facing away from the outlet of the falling sand machine, so that the falling sand flows along the chamfer.

10. The brake drum inner cavity sand removal tool according to claim 1, characterized in that: It comprises a main tooling and a plurality of sub-toolings; the sub-toolings are detachably connected to the main tooling, and when the plurality of sub-toolings are installed on the main tooling, the heights between the tops of the sub-toolings and the supporting surface are different.

11. A method for sand removal from a brake drum, characterized in that: The tool for removing sand from the inner cavity of a brake drum is applicable to any one of claims 1 to 10; the method for removing sand from the inner cavity of a brake drum comprises: Connecting the mother tooling to the shakeout machine; According to the model of the brake drum, a corresponding sub-tool is selected and detachably connected to the main tool; The brake drum to be desanded is placed on the desanding tooling, and the desanding machine is turned on to clean the old sand in the brake drum by vibration.

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